Abstract.Reproductive numbers are central to the epidemiological dynamics of any disease. However, estimating reproductive numbers have not been the explicit goal of college drinking researchers, since most of their research are not model driven. An epidemiological model capturing the dynamics of campus drinking is used to study how the ``disease" of drinking is spread on campus. An optimization technique using known bounds for each parameter is used to estimate the reproductive numbers associated with campus drinking. A theorem establishing the conditions under which an endemic steady state exists is proposed and proved.